Hidden under the Piano topic I mentioned freecycle.org - a yahoo newsgroup and thought it worth highlighting in its own topic. The group gives you the opportunity to give/receive unwanted, but workable items, that it seems criminal taking to the dump. Lots of charities/community groups subscribe, even theatre groups looking for weird props. You join up, advertise your want/offer and usually stipulate it must be collected and before you know it, it's got a new home. Only downside is lots of extra emails each day.
I've joined and its fab. Its like the cyberspace version of getting things out of skips (my flat is furnished and equipped out of skips - now I can move into the 21st century and use freecycle instead). The piano has gone though.